SSM整合

最新推荐文章于 2024-09-02 01:25:01 发布

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这篇博客详细介绍了SSM（Spring、SpringMVC、MyBatis）框架的整合过程，包括目录结构设计、实体类、DAO接口、Service接口及其实现、Controller层、Mapper XML映射文件、数据库配置database.properties、MyBatis配置mybatis-config.xml、Spring DAO、Service、MVC的XML配置文件以及应用和Web配置文件的应用。

目录结构图

在这里插入图片描述

实体类

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

@Getter
@Setter
@ToString
public class User {
    private Integer id;

    private String name;

    private Integer age;

    private String sex;
}

dao接口

package dangwei.dao;

import dangwei.model.User;

import java.util.List;

public interface UserMapper {

    List<User> selectAllUser();

    void insert(User user);

    void delete(Integer id);

    void update(User user);
}

service接口

import dangwei.model.User;

import java.util.List;

public interface UserService {

    List<User> selectAllUser();

    void insert(User user);

    void delete(Integer id);

    void update(User user);


}

service接口实现类

package dangwei.service;

import dangwei.dao.UserMapper;
import dangwei.model.User;

import java.util.List;

public class UserServiceImpl implements UserService{

    private UserMapper userMapper;
    public void setUserMapper(UserMapper userMapper){
        this.userMapper=userMapper;
    }

    public List<User> selectAllUser() {
        return userMapper.selectAllUser();
    }

    public void insert(User user) {
        userMapper.insert(user);
    }

    public void delete(Integer id) {
        userMapper.delete(id);
    }

    public void update(User user) {
        userMapper.update(user);
    }
}

controller层

package dangwei.controller;


import dangwei.model.User;
import dangwei.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired(required = false)
    private UserService userService;

    @GetMapping("/select")
    public String selectAllUser(Model model){
        List<User> users=userService.selectAllUser();
        model.addAttribute("allUser",users);
        return "allUser";
    }
}

mapper.xml映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="dangwei.dao.UserMapper">

  <!--  <resultMap id="result" type="user">
        <id column="id" property="id"/>
        <result column="name" property="name"/>
        <result column="age" property="age"/>
        <result column="sex" property="sex"/>
    </resultMap>
-->
    <select id="selectAllUser" resultType="user">
        select * from user
    </select>



</mapper>

database.propertites

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/course?useSSL=true&useUnicode=true&characterEncoding=utf8
username=root
password=

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <typeAliases>
        <package name="dangwei.model"/>
    </typeAliases>

    <mappers>
        <mapper resource="dangwei/dao/UserMapper.xml"/>
    </mappers>

</configuration>

spring-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder location="database.properties"/>

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${driver}"/>
        <property name="jdbcUrl" value="${url}"/>
        <property name="user" value="${username}"/>
        <property name="password" value="${password}"/>

        <property name="maxPoolSize" value="15"/>
        <property name="minPoolSize" value="5"/>

        <!--设置是否自动提交-->
        <property name="autoCommitOnClose" value="false"/>
        <!--设置连接超时时间-->
        <property name="checkoutTimeout" value="10000"/>
        <!--设置失败重试次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="dangwei.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

</beans>

spring-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">


    <context:component-scan base-package="dangwei.service"/>


    <bean id="service" class="dangwei.service.UserServiceImpl">
        <property name="userMapper" ref="userMapper"/>
    </bean>

    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" value="dataSource"/>
    </bean>


</beans>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       https://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/cache/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <mvc:annotation-driven/>
    <!--静态资源过滤-->
    <mvc:default-servlet-handler/>

    <context:component-scan base-package="dangwei.controller"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

application.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">

    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>


</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">


    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:application.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


    <filter>
        <filter-name>filter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>